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锻钢对焊闸阀

锻钢对焊闸阀是采用锻造钢材制造、通过对焊连接(焊接端与管道直接焊接)与管路系统集成的闸阀,核心功能是实现高压、高危工况下介质的全开 / 全关控制,因连接强度高、密封性可靠,广泛应用于工业严苛管路中。


公称压力:PN16~PN420、ANSI Class 150~4500LB

公称通径:DN15~DN300

适用温度:-196℃~650℃

适用介质:水、蒸汽、油品、天然气、氢气、强腐蚀性介质、含颗粒介质

执行方式:手动(手轮 / 手柄)、电动、气动


核心优势

● 高压高稳:锻造材质 + 对焊连接,抗压强度远超铸钢闸阀,可长期稳定工作于 Class 4500LB(约 76MPa)高压工况,无连接松动风险;

● 密封可靠:硬质合金密封面 + 多形式密封结构(填料 / 波纹管),泄漏率可达 “ANSI B16.104 Class V”(气泡级泄漏)或零泄漏,满足严苛密封要求;

● 适用广泛:耐温范围覆盖极寒(LNG 工况 - 196℃)至高温(火电超临界蒸汽 650℃),介质兼容性强,可适配大多数工业流体;

● 寿命长久:锻造材质抗疲劳性好,硬质合金密封面耐磨,正常维护下使用寿命可达 10 年以上,远高于普通铸钢阀门。

Products and services that meet fluid control requirements

Each process, each facility, and each environmental constraint has its own special requirements. Therefore, Dongyan offers a comprehensive range of products covering different performance levels, pressures, different functions and different materials.

Detail

选型与维护要点

1、选型关键:

● 根据介质特性选材质(如腐蚀性介质选 316L,高温选 F22 合金钢);

● 根据压力温度选公称压力(如 Class 600 对应 PN100,需留 1.2 倍安全系数);

● 根据密封要求选密封形式(有毒介质必选波纹管密封)。


2、维护要点:

● 定期检查填料压盖,若出现微量泄漏,需适当拧紧压盖螺栓(避免过紧导致阀杆卡涩);

● 每 3-6 个月对阀杆涂抹润滑脂(高温工况用高温润滑脂,如二硫化钼),减少升降磨损;

● 避免阀门长期处于 “半开” 状态,启闭时需旋转到位(明杆闸阀注意阀杆升降极限,防止超程损坏)。

Product Application Scope

These devices are suitable for accurately controlling media such as gases, liquids, steam, etc., and maintaining process parameters such as pressure, flow rate, temperature, and liquid level at given values. Especially suitable for work environments where the allowable pressure difference is small and the allowable leakage is also small, and the pressure difference is not significant.

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